69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
// mutex -*- C++ -*-
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// Copyright (C) 2008 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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#include <mutex>
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#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
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namespace std
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{
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const defer_lock_t defer_lock = defer_lock_t();
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const try_to_lock_t try_to_lock = try_to_lock_t();
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const adopt_lock_t adopt_lock = adopt_lock_t();
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const char*
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lock_error::what() const throw()
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{ return "std::lock_error"; }
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#ifdef _GLIBCXX_HAVE_TLS
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__thread void* __once_callable;
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__thread void (*__once_call)();
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#else
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// explicit instantiation due to -fno-implicit-instantiation
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template class function<void()>;
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function<void()> __once_functor;
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mutex __once_mutex;
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unique_lock<mutex> __once_functor_lock(__once_mutex, defer_lock);
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#endif
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extern "C"
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{
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void __once_proxy()
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{
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#ifndef _GLIBCXX_HAVE_TLS
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function<void()> __once_call = std::move(__once_functor);
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__once_functor_lock.unlock();
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#endif
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__once_call();
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}
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}
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}
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#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1
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